The recent incident where 4 million U.S. government employees fell victim to a cyber-attack was a shocking wake up call. It showed that we live in a world in which a staggering amount of information—much of it highly sensitive or confidential—is routinely held on computers that are far from being 100% secure. In the UK, there are many well-publicized cases of laptops containing confidential information on Prison Officers, Armed Forces personnel and members of the public having been stolen, and these show just how easily information can fall into the wrong hands.